Specify custom node IDs to Data

[harish-vnkt]

I have a graph that has specific, alpha-numeric node IDs for each of it's nodes. My edge index defines the connectivity information using these node IDs. I want to create a Data object and preserve node ID information for downstream visualization tasks. But the current examples tell me that the node ID is inferred from the feature matrix x and that I need a mapping from the custom node IDs to the 0-indexed format used by the Data object. Is that interpretation correct? If so, is there a way to define the Data object without needing to maintain a mapping?

[wsad1]

Your interpretation is correct. The values in edge_index are the indices of x i.e if you have an edge (1,2) that means x[1] is connected to x[2].
If you don't have a way of computing the alpha-numeric ID from the node id then you'll probably have to maintain a mapping.

[harish-vnkt]

Got it. Thank you!